How to monitor Internet sent data?

Hello,

I would like to know if there's any way I can track any byte sent from / received by my computer over an internet connection?

Thanks.

sniffers are good for that :)
www.ethereal.com

*Moved from AntiOnline: How do I?*

Didn't find there a thing about sniffers.

any exact url?

Ethereal is good,

http://www.ethereal.com/download.html and
http://www.ethereal.com/docs/user-guide/x1061.html

They have packages for linux, BSD and windows

There are other too, but I prefer Ethereal...

Btw Tampa, think your url is not quite good :s

snort is great too

www.snort.org

www.tcpdump.org :)

Thank u all